Hi guys. I'm a regular over at SVRider, but I thought I'd sign up and spend some more time over here too.
I've got a 2002 SV650 that I'm probably going to sell or part out soon. And I also have a 2003 SV650S that I'm turning into a sport touring machine with hard luggage.

Is that seriously 20 USD? What sort of quality is it? It looks fantastic. How is it mounted?

Yes it is about $20 shipped. There is no mounting hardware included, but it can be easily bought at a hardware store ($7-8).

I used the following on each side:
40mm M8 x 1.25 stud
Washer & Hex nut on the inside of the headlight
Washer & Jam nut on the outside
Mounted the screen over that
And finished it off with a washer and acorn nut